131345421255221 has 8 divisors (see below), whose sum is σ = 132350611137024. Its totient is φ = 130343947418160.

The previous prime is 131345421255197. The next prime is 131345421255259. The reversal of 131345421255221 is 122552124543131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131345421255221 - 2²² = 131345417060917 is a prime.

It is a super-2 number, since 2×131345421255221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131345421258221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 928940225 + ... + 929081606.

It is an arithmetic number, because the mean of its divisors is an integer number (16543826392128).

Almost surely, 2^{131345421255221} is an apocalyptic number.

It is an amenable number.

131345421255221 is a deficient number, since it is larger than the sum of its proper divisors (1005189881803).

131345421255221 is a wasteful number, since it uses less digits than its factorization.

131345421255221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858022371.

The product of its digits is 288000, while the sum is 41.

Adding to 131345421255221 its reverse (122552124543131), we get a palindrome (253897545798352).

The spelling of 131345421255221 in words is "one hundred thirty-one trillion, three hundred forty-five billion, four hundred twenty-one million, two hundred fifty-five thousand, two hundred twenty-one".